2X-5Y+8=3X+Y-5求XY2x-5y+8的绝对值+3x+y-5根号=0求实数x、y

2X-5Y+8=3X+Y-5求XY2x-5y+8的绝对值+3x+y-5根号=0求实数x、y 2x^3y+4x^2y+2xy2x^3 y+4x^2 y+2xy 因式分解：x3-2x3y+xy2X的3次方-2X的3次方乘Y+X乘Y2次方 计算2m/5n²p-3n/4mp²还有两题：3y/2x+2y+2xy/x²+xy2x/x²-64y²-1/x-8y就这三题，做起来有很多疑问。 1、2a/5a^2b+3b/10ab^22、2m/5n^2p-2n/4mp^23/3y/2x+2y+2xy/x^2+xy2x/x^2-64y^2-1/x-8y错了，修改：1、2a/5a^2b+3b/10ab^22、2m/5n^2p-2n/4mp^23、3y/2x+2y+2xy/x^2+xy4、2x/x^2-64y^2-1/x-8y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) y=x^3-5x^2+2x-8 求y^2求y撇 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知:3x-5y=0,求x/y,x-y/y,x-y/x 计算下列各题(a+b/a-b)²*2a-2b/a+3b - a²/a²-b²÷a/b3y/2x+2y + x²+2xy/xy2x/x²+64y² + x+8y/x²+64y² {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 6x-2y=5 8x-3y=-5 求x,y x+y=8 2x-y=1 求3x+5y 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值 已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]/(8x)) x-2y=2008求{(3x+2y)(3x-2y)-(x+2y)(5x-2y)}/8x 已知x-2y=2010,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值 已知:x-2y=2009,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x 的值